Welcome to the Q&A Forum

I have observed some drop in my Domain Authority, What's the reason because No backlinks drawn from my website.

hey, boss this just happening #IMO that when You make High Domain authority Backlinks then the DA of your site also increases but when You loss some backlinks then The DA of your site also decreases Like I have experience in One of my client company site https://www.jasonmolding.com I have done SEO in starting the DA rapidly increase and after some time the site lost some backlinks and users then DA of the site also decrease..... So check out your backlinks also may be you also lost some kind of high DA backlinks....